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@startuml
autonumber

actor Drools_Policy_Designer as User
 
participant API

database Policy_DB as DB

participant Nexus

User -> Nexus: develop and deploy dependency JAR to nexus

User -> Nexus: develop and deploy DRL JAR to nexus 

User -> API: POST - create TOSCA policy

API -> Nexus: validate JAR existence and Drools controller config

alt non-existence or invalid config

  API -> User: JAR non-existence or invalid controller config

else everything is good
  
  API -> DB: store policy in DB

  DB -> API: success
 
  API -> User: 200 Success

end
@enduml

@startuml
autonumber

actor Drools_Policy_Designer as User

database Policy_DB as DB

participant API

participant PAP

participant DroolsPDP as PDP

participant Nexus

User -> PAP: POST - deploy policy

PAP -> API: GET the policy

API -> DB: read from DB

DB -> API: success

API -> PAP: return the policy

PAP -> PDP: public dmaap - deploy policy

PDP -> Nexus: pull the JAR

Nexus -> PDP: success

PDP -> PDP: instantiate a new drools controller

PDP -> PDP: load DRL and facts into memory

PDP -> PAP: publish dmaap - policy deployed

PAP -> User: 200 success

PAP -> PAP: publish policy update notification
@enduml

@startuml
autonumber

actor Drools_Policy_Designer as User

participant PAP

participant DroolsPDP as PDP

User -> PAP: DELETE - undeploy policy

PAP -> PDP: publish dmaap - undeploy policy

PDP -> PDP: DELETE - disable the controller

PDP -> PAP: publish dmaap - policy undeployed

PAP -> User: 200 success

PAP -> PAP: publish policy update notification
@enduml

@startuml
autonumber

actor Drools_Policy_Designer as User

participant API

database Policy_DB as DB

participant Nexus

User -> API: DELETE - delete policy

API -> DB: remove policy from DB 

DB -> API: success

API -> Nexus: remove JAR from nexus

Nexus -> API: success

API -> User: 200 success
@enduml